My Inquiry
My Account
NXP Semiconductors SCC2692AC1B44,551
- Part No.:
- SCC2692AC1B44,551
- Manufacturer:
- NXP Semiconductors
- Package:
- 44-QFP
- Datasheet:
-
SCC2692AC1B44,551.pdf
- Description:
- IC UART DUAL W/FIFO 44QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,515
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SCC2692AC1B44,551 from NXP Semiconductors (formerly Philips) is a dual-channel CMOS asynchronous receiver/transmitter (DUART) in 44-pin PQFP package, supporting independent programmable baud rates up to 115.2 kbaud per channel, quadruple-receiver buffering, and TTL-compatible +5 V operation for industrial serial communication interfaces.
For engineers reviewing the SCC2692AC1B44,551 datasheet, SCC2692AC1B44,551 pinout, SCC2692AC1B44,551 application, or SCC2692AC1B44,551 equivalent, key selection considerations include dual full-duplex UART channel independence, 16-bit counter/timer integration, multidrop wake-up mode support, and 44-pin PQFP mechanical compatibility with legacy board layouts.
Technical Context
The SCC2692AC1B44,551 implements two independent UART channels (A and B), each with fully programmable data format (5–8 data bits, odd/even/no/force parity, 1/1.5/2 stop bits), separate receiver/transmitter clock sources (crystal oscillator, 16-bit counter/timer, or external 1X/16X clocks), and hardware flow control via RTS/CTS signaling.
Its timing subsystem integrates an on-chip crystal oscillator (3.6864 MHz nominal), a 16-bit programmable counter/timer operating in timer, counter, or receiver timeout modes, and four clock selectors enabling independent baud rate assignment per channel - critical for clustered terminal systems requiring asymmetric transmit/receive speeds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Baud Rate Range | 50 to 115.2 kbaud per channel; supports non-standard rates via 16-bit counter/timer or external clock inputs. |
| Data Format | Programmable per channel: 5–8 data bits, odd/even/no/force parity, 1/1.5/2 stop bits in 1/16-bit increments. |
| Receiver Buffering | Quadruple-buffered receive holding register per channel; reduces interrupt overhead and prevents overrun in high-speed polling. |
| Interrupt System | Single active-low open-drain INTRN output with eight maskable conditions; OP3–OP7 configurable as discrete wire-ORable interrupt outputs. |
| Power Supply | +5 V ±10%; operates across commercial (0 to +70°C) and industrial (−40 to +85°C) temperature ranges. |
| Crystal Oscillator | On-chip oscillator accepting 3.6864 MHz crystal (X1/CLK and X2 pins); also accepts external clock input at X1/CLK. |
| Max Data Rate | 1 MB/sec at 1X clock mode; 125 kB/sec at 16X clock mode - determined by internal bus timing and strobe widths. |
Pinout & Package
SCC2692AC1B44,551 uses a 44-pin Plastic Quad Flat Pack (PQFP) package (SOT307-2), lead-free and RoHS-compliant per NXP documentation. Pin functions are electrically identical to other SCC2692 variants but physically mapped to PQFP layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 40–44 | Address/Data Bus Interface | A0–A3 address lines and D0–D7 bidirectional data bus enable CPU register access; 3-state controlled by CEN, RDN, WRN. |
| 24, 38 | Interrupt Outputs | INTRN (active-low open-drain) and OP6/OP7 (programmable TxRDY outputs) provide flexible interrupt routing for real-time response. |
| 11, 13, 35, 33 | Serial I/O | RxDA/RxDB (channel A/B receive inputs), TxDA/TxDB (channel A/B transmit outputs); TTL-compatible, mark=high, space=low. |
| 36, 37 | Clock Inputs | X1/CLK accepts crystal or external clock (0–4 MHz); X2 completes crystal connection or floats - no pull-down required. |
| 8, 10, 12, 14–17, 19, 21–23, 25–27, 29, 31, 34, 39, 41–43 | Multipurpose I/O | IP0–IP6 (7-bit input port with change-of-state detection) and OP0–OP7 (8-bit output port with individual bit set/reset) support custom control logic. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent UART channels | Enables simultaneous RS-232/RS-422 links without external multiplexing; ideal for multi-peripheral embedded hosts. |
| Quadruple receiver buffering | Reduces CPU interrupt frequency by 75% vs single-buffer UARTs, improving deterministic latency in interrupt-driven systems. |
| Programmable 16-bit counter/timer | Generates precise baud clocks, time delays, or receiver timeout signals - eliminates need for external timing ICs. |
| Multidrop wake-up mode | Supports 9-bit addressing in multidrop networks; allows selective channel activation without continuous polling of all nodes. |
| Hardware flow control I/O | RTS/CTS pins (OP0/OP1, IP0/IP1) integrate automatic handshake control, reducing software overhead in high-throughput transfers. |
Applications
| Industrial HMI Terminal | Legacy Equipment Retrofit |
|---|---|
Use Scenario: Connecting PLCs and operator panels via RS-232/422 in factory automation cabinets with space-constrained PCBs. IC Role / Device Role / Timing Role: Dual UART bridge between microcontroller and two serial peripherals; provides independent baud rate control for mixed-speed devices. Use Value: Eliminates need for two discrete UART ICs; PQFP footprint matches legacy board layouts while enabling firmware-upgradable communication stacks. | Use Scenario: Replacing obsolete SCN2681-based serial controllers in medical diagnostic instruments requiring long-term component availability. IC Role / Device Role / Timing Role: Pin- and function-compatible DUART replacement with enhanced receiver buffering and counter/timer flexibility. Use Value: Maintains existing firmware and PCB design; quadruple buffering improves reliability during burst-mode data acquisition from sensors. |
| Clustered Point-of-Sale System | Secure Access Control Panel |
Use Scenario: Managing concurrent serial links to receipt printer, magnetic stripe reader, and PIN pad in retail kiosks. IC Role / Device Role / Timing Role: Central serial interface controller with asymmetric channel speeds - e.g., 9600 baud to printer, 115.2 kbaud to reader. Use Value: Independent transmitter/receiver clock selection per channel avoids speed negotiation bottlenecks and simplifies driver development. | Use Scenario: Enabling secure serial communication between biometric sensor, smart card reader, and host MCU in physical access terminals. IC Role / Device Role / Timing Role: Dual-channel UART with hardware flow control and false start bit detection ensures robust command/response integrity. Use Value: Built-in framing/parity/overrun error detection reduces firmware validation burden; multidrop mode supports future expansion to multiple credential readers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SCC2692AE1B44 | Industrial temperature grade (−40 to +85°C); identical electrical specs and pinout. | Required for extended-temperature deployments such as outdoor kiosks or vehicle-mounted terminals. | Select SCC2692AE1B44 when ambient operating temperature exceeds +70°C. |
| SCN2681ACZ | Legacy 40-pin DIP variant; lacks counter/timer, multidrop mode, and quadruple buffering; lower max baud rate (64 kbaud). | Suitable only for basic point-to-point links where advanced features are unused. | Choose SCN2681ACZ only for cost-sensitive, low-complexity designs with no requirement for dual-speed or wake-up functionality. |
Compared with SCC2692AE1B44, the SCC2692AC1B44,551 offers identical functionality at commercial temperature range - reducing BOM cost where industrial-grade operation is unnecessary. Versus SCN2681ACZ, it delivers higher throughput, deeper buffering, and integrated timing - justifying migration for new designs requiring scalability or reliability.
Availability
SCC2692AC1B44,551 is available at Aetrix Electronics and suitable for industrial HMI terminals, legacy equipment retrofits, clustered POS systems, and secure access control panels requiring stable component supply across multi-year production cycles.
Supply support for SCC2692AC1B44,551 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in legacy communications ICs from its Philips Semiconductors origin.
The SCC2692AC1B44,551 belongs to NXP's legacy industrial communications portfolio, designed specifically for long-lifecycle embedded systems requiring pin-compatible upgrades from SCN2681 and robust UART functionality in space-constrained industrial enclosures.
FAQ
What is the maximum supported baud rate for each channel of the SCC2692AC1B44,551?
The SCC2692AC1B44,551 supports up to 115.2 kbaud per channel using standard rates derived from a 3.6864 MHz crystal. Non-standard rates up to 115.2 kbaud are achievable via the 16-bit counter/timer or external clock inputs. The device does not support rates beyond this limit, and actual performance depends on signal integrity, cable length, and line driver capability in the target system. SCC2692AC1B44,551 maintains full compliance with these specifications across its commercial temperature range.
Does the SCC2692AC1B44,551 include an on-chip crystal oscillator?
Yes, the SCC2692AC1B44,551 integrates an on-chip crystal oscillator that operates with a 3.6864 MHz crystal connected between X1/CLK and X2 pins. It also accepts an external clock signal applied to X1/CLK, bypassing the crystal. The oscillator serves as the primary timing reference for the baud rate generator, counter/timer, and internal logic. SCC2692AC1B44,551 requires continuous clocking - either from crystal or external source - to maintain UART synchronization and interrupt timing accuracy.
How many interrupt sources does the SCC2692AC1B44,551 support, and how are they configured?
The SCC2692AC1B44,551 supports eight maskable interrupt conditions routed through a single active-low open-drain INTRN output. These include receiver ready, transmitter ready, break detect, framing error, parity error, overrun error, counter/timer event, and input port change. Additionally, outputs OP3–OP7 can be individually programmed as discrete wire-ORable interrupt outputs. SCC2692AC1B44,551 uses the Interrupt Mask Register (IMR) to enable/disable specific sources and the Interrupt Status Register (ISR) to identify pending conditions - enabling flexible priority handling in resource-constrained systems.
Can the SCC2692AC1B44,551 operate in multidrop (9-bit) mode, and what is required to enable it?
Yes, the SCC2692AC1B44,551 supports multidrop (also called 'wake-up' or '9-bit') mode via programmable channel mode registers (MR1A/MR2A and MR1B/MR2B). To enable it, configure the channel for 9-bit character format and set the appropriate bits in the mode registers to activate address detection and automatic response suppression. This allows one master node to selectively address slaves on a shared bus. SCC2692AC1B44,551 implements this entirely in hardware - no external logic or firmware bit-banging is required - making it suitable for distributed industrial control networks.
What are the power supply requirements and thermal specifications for the SCC2692AC1B44,551?
The SCC2692AC1B44,551 requires a single +5 V ±10% supply (VCC) referenced to GND, with typical operating current of 10 mA and power-down current of 2–10 µA. It is rated for commercial temperature operation from 0°C to +70°C. Absolute maximum ratings specify VCC from −0.5 V to +7.0 V and storage temperature from −65°C to +150°C. Derating above 25°C is 17 mW/°C for the PQFP package. SCC2692AC1B44,551 meets these specifications without external heat sinking under normal airflow conditions in enclosed industrial enclosures.
SCC2692AC1B44,551 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-QFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Features:
- Configurable GPIO, Internal Oscillator, Timer/Counter
- Number of Channels:
- 2, DUART
- FIFO's:
- -
- Protocol:
- -
- Data Rate (Max):
- 1Mbps
- Voltage - Supply:
- 5V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- -
- With False Start Bit Detection:
- Yes
- With Modem Control:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PQFP (10x10)
SCC2692AC1B44,551 FAQ
1.How can I place an order for SCC2692AC1B44,551 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCC2692AC1B44,551 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SCC2692AC1B44,551 reliable?
The price and inventory of SCC2692AC1B44,551 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCC2692AC1B44,551 is usually 5 days.
3.What payment methods are accepted for SCC2692AC1B44,551?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCC2692AC1B44,551 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCC2692AC1B44,551?
SCC2692AC1B44,551 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCC2692AC1B44,551 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SCC2692AC1B44,551?
For technical support, including SCC2692AC1B44,551 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCC2692AC1B44,551 requirements.
6.How does Aetrix verify that SCC2692AC1B44,551 is sourced from the original manufacturer or authorized distributors?
All SCC2692AC1B44,551 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SCC2692AC1B44,551 meets industry standards.
7.What is the process for return or replacement of SCC2692AC1B44,551?
All SCC2692AC1B44,551 units undergo pre-shipment inspection (PSI). If there is an issue with SCC2692AC1B44,551, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SCC2692AC1B44,551 part is unused and in its original packaging.
Return procedure for SCC2692AC1B44,551:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SCC2692AC1B44,551 Tags
-
SC16IS741AIPWJ
NXP Semiconductors
-
TL16C550CPTR
Texas Instruments
-
TL16C550CIPTR
Texas Instruments
-
SC16C752BIB48,128
NXP Semiconductors
-
ST16C2550CQ48-F
MaxLinear, Inc.
-
ST16C2550CJ44-F
MaxLinear, Inc.
-
ST16C2552CJ44-F
MaxLinear, Inc.
-
ST16C1550IQ48-F
MaxLinear, Inc.
-
ST16C2550IQ48-F
MaxLinear, Inc.
-
ST16C554DIQ64-F
MaxLinear, Inc.
-
ST16C554DCQ64-F
MaxLinear, Inc.
-
XR17V352IB113-F
MaxLinear, Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
